Comparison between geoelectric and electromagnetic sounding responses in volcanic areas

Abstract

The structure of active and inactive volcanoes can be explored with electric and electromagnetic surveys. We test the actual applicability of prospecting methods that employ both stationary and time-varying fields, using mathematical models both for layered and complex structures. The geometry and the resistivities of the geological structures which are considered have been taken from real case studies reported in the literature. In particular we analyse the sensitivity of different methods to conductive and resistant bodies.

Keywords

• resistivity soundings
• TDEM
• magnetotellurics
• volcanic structures
• mathematical models